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Facet Publication Year 1980 [X]
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141	Author	G. C. Papavassiliou, D. Layek	Requires cookie*
	Title	Electronic and Resonance Raman Spectra of Some New Mixed-Valence Compounds of Pt and Pd with a Metal-Halide Chain
	Abstract	The electronic and resonance Raman spectra of new mixed-valence compounds of the type M2'[M(L)X3][M(L)X5], where M' = K, NH4, M -Pt or Pd, L = NH3 or pyridine, and X = Cl, Br or I, have been studied. The single-crystal polarized reflectance spectra indicate the one-dimensional semiconductor behaviour. The polarized resonance Raman spectra confirm the —M(II)—X-M(IV)-X linear chain structure, which is in accordance with the X-ray results. The polarization of M-N bands can be explained by the Snyder's theory (1971).
	Reference	Z. Naturforsch. 35b, 676—679 (1980); received January 14 1980
	Published	1980
	Keywords	Electronic Spectra, Raman Spectra, Mixed-Valence, Oriented Molecules
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	Identifier	ZNB-1980-35b-0676
	Volume	35

142	Author	WolfgangA. Herrmann, Johann Plank, Ivan Bernal, Michael Creswick	Requires cookie*
	Title	Übergangsmetall-Methylen-Komplexe, X [1] Methylen-und Alkyl-Eisen-Komplexe aus Diazoalkanen. Molekülstruktur von //-Carbonyl-//-feri-butoxycarbonyl-methylen- bis [carbonyl(^ 5 -cyclopentadienyl)eisen] (Fe-Fe) Transition Metal Methylene Complexes, X [1J Methylene and Alkyl Iron Complexes from Diazoalkanes. Molecular Structure of //-Carbonyl-^-Jerf-butoxycarbonyl-methylene- bis[carbonyl(if-cyclopentadienyl)iron] (Fe-Fe)
	Abstract	The novel doubly bridged /i-methylene iron complexes /M-[C(H)C02R]-^-C0[(??5.C5H5)Fe(C0)]2 (R = C2H5: 3a; R — ^Hg: 3b) have been syn-thesized by low-temperature photolysis of the corresponding alkyldiazoacetates 2 a and 2 b, resp., in the presence of [(r? 5 -CsH5)Fe(CO)2]2 (1) and characterized by means of their analytical data and IR, X H NMR and mass spectroscopy. The geometry of 3 b has been established by single crystal X-ray diffraction techniques. cr-Alkyl iron complexes of the type (^ 5 -C5H5)Fe(C0)2[CHRR'] are accessible from the corresponding diazoalkanes N2 = CRR'.
	Reference	Z. Naturforsch. 35b, 680—688 (1980); eingegangen am 3. Dezember 1979
	Published	1980
	Keywords	^-Alkoxycarbonylmethylene, cr-Alkyl, Bridging Ligands, Carbonyl Complexes, Iron
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	Identifier	ZNB-1980-35b-0680
	Volume	35

143	Author	Helmut Werner, Rainer Feser	Requires cookie*
	Title	Synthese und Reaktivität von rj 5 -Indenyl-trimethylphosphanrhodium(I) - und -rhocüum(HI)-Komplexen [1] Synthesis and Reactivity of rf -Indenyl-trimethylphosphanerhodium (I) and -rhodium(III) Complexes [1]
	Abstract	Indenylbis(trimethylphosphane)rhodium(I), Synthesis, Reactivity, Indenylhydridobis(trimethylphosphane)rhodium(III) Cation, Lewis Bases The Compounds [(PMe3)2RhCl]2 and [Rh(PMe3)4]Cl react with indenyllithium to give C9H7Rh(PMe3)o. The strong Lewis basicity of this complex is demonstrated by its reactions with NH4PF6, Mel and MeCOCl which lead to the cations [C9H7RhR(PMe3)2] + (R = H, Me, COMe). The hydrido complex [C9H7RhH(PMe3)2]PF6 reacts with 1,5-C8Hi2, CO and PMe3 by complete displacement of indene to give [Rh(PMe3)2(C8Hi2)]PF6, [Rh(PMe3)2(CO)3]PF6 and [Rh(PMe3)4]PF6. Reaction of [C9H7RhH(PMe3)2]PF6 with C2H4 yields an equilibrium mixture containing the cationic tris(ethylene) complex [Rh(PMe3)2(C2H4)3] + .
	Reference	Z. Naturforsch. 35b, 689—693 (1980); eingegangen am 19. Februar 1980
	Published	1980
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	Identifier	ZNB-1980-35b-0689
	Volume	35

144	Author	Joseph Grobe, Due Le Van	Requires cookie*
	Title	Perfluormethyl-Element-Liganden, XXIII [1]
	Abstract	Darstellung und spektroskopische Untersuchung von Mo(CO)5L-Komplexen (L = R2EER2 , R2EE R; R, R -CH3, CF3; E = P, As; E = S, Se, Te) Perfluoromethyl Element Ligands, XXIII [1] Preparation and Spectroscopic Investigation of Mo(C0)5L Complexes (L = R2EER2', RsEE'R; R, R' = CH3, CF3; E = P, As; E' = S, Se, Te) Trifluormethyl Element Compounds, Organoelement Compounds of Main Groups V and VI, Pentacarbonylmolybdenum Derivatives Mo(CO)5L complexes (L = R2EER2', R2EE'R; R, R' = CH3 and/or CF3; E = P, As; E' = S, Se, Te) have been prepared by reaction of Mo(CO)5THF with L at room tem-perature. The new compounds were characterized by analytical and spectroscopic (IR, NMR, MS) methods.
	Reference	Z. Naturforsch. 35b, 694—699 (1980); eingegangen am 11. Januar 1980
	Published	1980
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	Identifier	ZNB-1980-35b-0694
	Volume	35

145	Author	Wolf-Walther Du Mont, Heinz-Jürgen Kroth	Requires cookie*
	Title	19 Sn-NMR-Ver8chiebungen und Koordinationsverschiebungen von Halogenstannylenkomplexen U9 Sn-NMR Shifts and Coordination Shifts of Halogenostannylene Complexes
	Abstract	Halogenostannylene Complexes, 119 Sn NMR Coordination Shifts 119 Sn NMR data of a number of base-stabilized stannylenes L (L = R3P-SnCl2, (THF)zSnCl2, (THF^SnBr^ are compared with those of the corresponding tin ylid complexes M(CO)sL (M = Cr, W). 119 Sn NMR coordination shifts are strongly dependent on the transition metal. Increasing the number of base ligands attached to transition metal-coordinated tin(II) leads to significant upfield shifts and to increasing coupling constants W 19 Sn^W).
	Reference	Z. Naturforsch. 35b, 700—702 (1980); eingegangen am 13. Februar 1980
	Published	1980
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	Identifier	ZNB-1980-35b-0700
	Volume	35

146	Author	Martin Pfisterer, Günter Nagorsen	Requires cookie*
	Title	Zur Struktur ternärer Übergangsmetallarsenide On the Structure of Ternary Arsenides
	Abstract	New ternary arsenides ET2AS2 (E = Ca, Sr, Ba; T = Cr, Fe, Co, Ni, Cu) were prepared. The cell data were determined by X-ray powder methods. All these compounds crystallize in the tetragonal ThCr2Si2 structure (I4/mmm), which consists of layers of edge-shared TAS4 tetrahedra. The alkaline-earth atoms are intercalated between the layers.
	Reference	Z. Naturforsch. 35b, 703—704 (1980); eingegangen am 28. Januar 1980
	Published	1980
	Keywords	Intermetallic Compounds, Crystal Data, Ternary Arsenides
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	Identifier	ZNB-1980-35b-0703
	Volume	35

147	Author	Dimitrios Jannakoudakis, Elli Theodoridou	Requires cookie*
	Title	Über den Einfluß des pH-Wertes auf die polarographische Reduktion der Nitrophenole mit und ohne Zusatz von Campher On the Influence of the pH Value on the Polarographic Reduction of the Nitrophenols in Presence and Absence of Campher
	Abstract	The Polarographie behavior of the nitrophenols in the pH range 1-13 and the in-fluence of campher on the polarographic curves are studied. The pH dependence of the half wave potentials and the different reduction of the depolarizers in their molecular or anionic form are discussed.
	Reference	Z. Naturforsch. 35b, 705—708 (1980); eingegangen am 8. Februar 1980
	Published	1980
	Keywords	Nitrophenols, Polarography, Half Wave Potential, Inhibitor
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	Identifier	ZNB-1980-35b-0705
	Volume	35

148	Author	A. Georgiades, G. Schilling, H. P. Latscha	Requires cookie*
	Title	Reaktion von Bismuttrichlorid mit N,N'-Bis(trimethylsilyl)-harnstoff und Aceton Reaction of BiCL with N,N'-Bis(trimethylsilyl)urea and Acetone
	Abstract	4,4,10,10 -Tetramethy lspiro [5,5]-l,3,7,9 -tetrazaundecadion -2,8-Bismuthtrichloride
	Reference	Z. Naturforsch. 35b, 709—711 (1980); eingegangen am 18. Januar 1980
	Published	1980
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	Identifier	ZNB-1980-35b-0709
	Volume	35

149	Author	IbrahimI. Abd, El Gawad, Abd El-Hammid, Mohamad Harhash+, M. M. Abou El-Zahab	Requires cookie*
	Title	Reinvestigation of the Behaviour of Benzal-anils towards the Action of Potassium Cyanide
	Reference	Z. Naturforsch. 35b, 712—714 (1980); received January 7 1980
	Published	1980
	Keywords	Benzal-anils, Addition Reaction, 4-Imidazolidinone, Ring Closure
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	Identifier	ZNB-1980-35b-0712
	Volume	35

150	Author	Emmanuel Chukwuemeka Okafor	Requires cookie*
	Title	The Metal Chelates of Heterocyclic /3-Diketones and their Derivatives, Part IV New Mixed Ligand Tetrakis Complexes of Lanthanides Derived from tris-Acetylacetonates and Some 4-Acyl Pyrazolones
	Abstract	Some new mixed ligand tetrakis chelates derived from tris acetylacetonates of La, Ce, Pr, Nd, and Gd -with other /?-diketones, like l-phenyl-3-methyl-4-benzoyl-pyrazolone-5 and l-phenyl-3-methyl-4-acetyl-pyrazolone-5 have been synthesised. The compounds are characterised by elemental analyses and IR data. The UV spectral properties and the conductance in DMF have also been reported.
	Reference	Z. Naturforsch. 35b, 715—718 (1980); received January 2 1980
	Published	1980
	Keywords	Lanthanon Mixed Ligand Tetrakis Chelates, Synthesis, UV Spectra, IR Spectra
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	Identifier	ZNB-1980-35b-0715
	Volume	35

151	Author	R. Battaglia, H. Kisch, C. Krüger, L.-K Lm	Requires cookie*
	Title	Übergangsmetallkomplexe von Diazenen, XV [1] Darstellung und Eigenschaften von Heterodimetallkomplexen des Typs LMM-(C£S-RN=NR)-M'LOT Transition Metal Complexes of Diazenes, XV [1] Synthesis and Properties of Heterodimetal Complexes LnM-(ci<s-RN=NR)-M'Lm
	Abstract	of type LnM(^ 2 -pentamethylenediazirine)M'L»», LnM/M'Lwj = (CO)5Cr/Mo(CO)5, (CO)5Cr/Fe(CO)4, (CO)5W/Fe(CO)4 and (CO)5Cr/Mn(CO)2 5 J?(-MeC5H4) were prepared from [M'Lm(THF)] or Fe2(CO)9 and (j? 1 -pentamethylenediazirine)MLn. The structure of the Cr/Mo complex was determined by X-ray analysis. The IR and UV-VIS data resemble those of the corresponding homodi-metal complexes.
	Reference	Z. Naturforsch. 35b, 719—723 (1980); eingegangen am 7. Februar 1980
	Published	1980
	Keywords	Diazene Complexes, Preparation, Structure Complexes
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	Identifier	ZNB-1980-35b-0719
	Volume	35

152	Author	Hans-Dietrich Stachel, Hermann Poschenrieder, Hans Burghard	Requires cookie*
	Title	Reduktone von Tetram-, Tetron-und Thiotetronsäuren Reductones of Tetramic, Tetronic and Thiotetronic Acids
	Abstract	Spiro-oxiranes, Retro-aldol Cleavage, Reductones The 3-spiro-3',3'-dimethyl-2'-oxiranes of 5-benzylidene-2,4-dioxo-pyrrolidone, 5-benzyl-idene-2,4-dioxotetrahydrofuranone and 5-benzylidene-2,4-dioxotetrahydrothiophene yield the corresponding heterocyclic reductones (3 a-c) upon treatment with sulfuric acid. The tetramic acid reducton 3 a can also be obtained by hydrolysis of the diazoniumsalt 5.
	Reference	Z. Naturforsch. 35b, 724—726 (1980); eingegangen am 19. Dezember 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0724
	Volume	35

153	Author	Oemer Saygin, Peter Decker	Requires cookie*
	Title	Nonenzymatic Catalysis by Metal Ions and Phosphoric Acid Esters of Hydroxamic Acid Formation*
	Abstract	Nonenzymatic catalysis by bivalent ions of Be, Mg, Ca, Zn, Mn, Ni and Co and bio-organic phosphates of the formation of hydroxamic acids from acetate or amino acids has been studied systematically. Increased yields of hydroxamate were observed at particular combinations of reactants. The most prominent increase (ca. 15-fold) was found with acetate and Ni++, and with a combination of ATP and Be++. Among others especially ribose-5-phosphate and glucose-5-phosphate enhanced yields in the presence of most metal ions. Since no release of inorganic phosphate was observed, this effect cannot be interpreted as an evidence for intermediate transhosphorylation reactions; it may also result from simple catalytic effects of metal sugar complexes.
	Reference	Z. Naturforsch. 35b, 727—730 (1980); received February 7 1980
	Published	1980
	Keywords	Prebiological Evolution, Bioids, Transphosphorylation, Hydroxylamine, Acylate Activation
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	Identifier	ZNB-1980-35b-0727
	Volume	35

154	Author	Norio Miyoshi, Giiti Tomita	Requires cookie*
	Title	Singlet Oxygen Production Photosensitized by Fluorescein in Reversed Micellar Solutions
	Abstract	The quantum yield of singlet oxygen production was investigated in dodecylammonium propionate reversed micellar solutions containing 1,3-diphenylisobenzofuran and fluo-rescein as photosensitizer. The quantum yield was highly enhanced by the binding of fluorescein to reversed micelles, and increased with decreasing the solubilized water content in reversed micelles. Results obtained was discussed with the optical properties of fluorescein (absorption, fluorescence and phosphorescence) in reversed micellar solutions.
	Reference	Z. Naturforsch. 35b, 731—735 (1980); received December 7 1979
	Published	1980
	Keywords	Singlet Oxygen, Fluorescein, Diphenylisobenzofuran, Water Content, Reversed Micelles
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	Identifier	ZNB-1980-35b-0731
	Volume	35

155	Author	Norio Miyoshi, Giiti Tomita	Requires cookie*
	Title	Buffer Action of Reversed Micelles
	Abstract	The optical properties (absorption and fluorescence) of fluorescein sodium were investi-gated with changing the bulk pH value in aqueous, water-methanol mixed and dodecyl-ammonium propionate reversed micellar solutions. A strong buffer action was found in the reversed micellar solutions. The pKa values for the equilibrium between fluorescein mono-and di-anions in the ground and excited singlet states highly decreased in the reversed micellar solutions compared with those in non-micellar solutions. The micellar buffer action strongly affected the initial rate of the 1,3-diphenylisobenzofuran oxidation caused by the photosensitization of fluorescein. The buffer action was closely related to the solubilized water content.
	Reference	Z. Naturforsch. 35b, 736—740 (1980); received January 9 1980
	Published	1980
	Keywords	Fluorescein, Reversed Micelles, Buffer Action, Solubilized Water
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	Identifier	ZNB-1980-35b-0736
	Volume	35

156	Author	Norio Miyoshi, Giiti Tomita	Requires cookie*
	Title	Solubilization of Methylene Blue in Reversed Micelles, Effect of Water
	Abstract	The solubilization of methylene blue in dodecylammonium propionate reversed micelles in cyclohexane depended strongly on the solubilized water content. Methylene blue solubilized in the micelle of which head groups are not completely hydrated by bound water exhibited the new absorption bands at 495 and 270 nm, but these bands did not appear in the micelle containing free water. This dye had the absorption bands at 655 and 290 nm in the latter micelle. The solubilizing process and solubilized state of methylene blue in the reversed micelles were discussed with results obtained.
	Reference	Z. Naturforsch. 35b, 741—745 (1980); received February 20 1980
	Published	1980
	Keywords	Methylene Blue, Reversed Micelles, Water Content, Solubilization
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	Identifier	ZNB-1980-35b-0741
	Volume	35

157	Author	M. Murugesan, K. Ramasamy, P. Shanmugam	Requires cookie*
	Title	Pyrroloquinolines, Part III [1] Synthesis of lH-Pyrrolo(2,3-b)quinolines
	Abstract	2 -Chloro -3 -vinyl quinolines, 2 -Amino -3 -vinyl quinolines, 2 -Acetamido -3 -viny lquinolines, 2-Chloro-3-(r,2'-dibroethyl)quinolines, 1 H-Pyrrolo(2,3-b)quinolines A new route to synthesis of pyrrolo(2,3-b)quinolines is described based on the use of 2-chloro-3-vinylquinolines as well as 2-chloro-3-(l',2'-dibromoethyl)quinolines.
	Reference	Z. Naturforsch. 35b, 746—748 (1980); received June 25 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0746
	Volume	35

158	Author	K. Burger, S. Penninger, S. Tremmel	Requires cookie*
	Title	Synthese yon 2.2-Dihydro-1.4.2-diazaphosphol-4-enen [1] Synthesis of 2,2-Dihydro-l,4,2-diazaphosphol-4-enes
	Abstract	,4-Bis(trifluoromethyl)-l,3-diazabuta-l,3-dienes below 0 °C react with P(III) com-pounds to give 2,2-dihydro-l,4,2-diazaphosphol-4-enes. IR, X H, 19 F, 31 P NMR, and mass spectra data of the new heterocyclic compounds are discussed.
	Reference	Z. Naturforsch. 35b, 749—753 (1980); eingegangen am 17. Januar 1980
	Published	1980
	Keywords	[4+l]-Cycloaddition Reactions, l, 3-Diazabuta-l, 3-dienes, Phosphorus Compounds, Pentacoordination 4
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	Identifier	ZNB-1980-35b-0749
	Volume	35

159	Author	DavidW. Allen, Helen Ward	Requires cookie*
	Title	The Chemistry of Heteroarylphosphorus Compounds, Part 14 [1] Effects of Heteroaryl Substituents at Phosphorus on the Steric Course of Wittig Reactions of Semistabilised and Stabilised Ylides
	Abstract	Alkene cis-trans Ratio, Betaine Mechanism, Cycloaddition Mechanism The cis-trans ratio of the stilbenes formed in Wittig reactions of semistabilised ylides (derived from benzyltri(hetero)arylphosphonium salts in ethanolic ethoxide) with benz-aldehyde decreases markedly in the series 2-furyl >2-thienyl >phenyl > 1-methylpyrrol-2-yl. The 2-furyl group favours a greater proportion of the ci«-isomer than m-trifiuoro-methylphenyl, whereas the l-methylpyrrol-2-yl group favours a greater proportion of the trans isomer than jo-methoxyphenyl. Similarly, in Wittig reactions of carbonyl-stabilised ylides with benzaldehyde and acetaldehyde, the presence at phosphorus of 2-furyl groups results in a significant increase in the proportion of the cis-alkene compared to that formed from the related triphenylphosphonium ylide. These results are discussed in terms of both betaine and cycloaddition mechanisms for the Wittig reaction. Also discussed is their relevance to recent proposals concerning the elimination of alkene from the intermediate oxaphosphetan.
	Reference	Z. Naturforsch. 35b, 754—757 (1980); received February 1 1980
	Published	1980
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	Identifier	ZNB-1980-35b-0754
	Volume	35

160	Author	Nicholas Bodor, JamesJ. Kaminski, S. D. Worley, StevenH. Gerson, N. J.	Requires cookie*
	Title	Quantitative Evaluation of the Reactivity of Alkylating Agents
	Abstract	A sensitive and reproducible method for quantitative evaluation of the relative reactivities of alkylating agents was developed, based on competitve alkylation. The method is superior to the known colorimetric methods. The reactivities of the agents could also be correlated with the 13 C chemical shifts of the a-methylene. The method was successfully applied for the ranking of "soft" alkylating agents of low reactivity. It was recently found that "soft" alkylating RI
	Reference	Z. Naturforsch. 35b, 758—763 (1980); received February 4 1980
	Published	1980
	Keywords	Alkylating Agents, Soft Drugs, NMR Spectra, Competitive Alkylation, Soft Quaternary Salts
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	Identifier	ZNB-1980-35b-0758
	Volume	35

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